(19)
(11) EP 2 180 581 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.11.2011 Bulletin 2011/46

(43) Date of publication A2:
28.04.2010 Bulletin 2010/17

(21) Application number: 09405179.4

(22) Date of filing: 12.10.2009
(51) International Patent Classification (IPC): 
H02K 3/47(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA RS

(30) Priority: 23.10.2008 US 257234 P

(71) Applicants:
  • Electromag SA
    1024 Ecublens (CH)
  • Micronel AG
    8317 Tagelswangen (CH)

(72) Inventor:
  • Comte, Vincent
    1052 Le Mont-sur-Lausanne (CH)

(74) Representative: Groner, Manfred et al
Isler & Pedrazzini AG Gotthardstrasse 53 Postfach 1772
8027 Zürich
8027 Zürich (CH)

   


(54) Brushless DC electric motor


(57) The brushless DC electric motor comprises,
a rotor including a shaft and a permanent magnet fixed on said rotor shaft, stator including a winding in the shape of a hollow cylinder and composed of a plurality of rhombic single coils made of flat wire. The single coils overlap each other in an imbricated manner, wherein the single coils are performed to form an offset at least in the region of two opposite corners. The winding have legs, wherein half of the legs are located in a first radius and half of the legs are located in a second radius. The motor further comprises a housing having two end plates and supporting said rotor and stator.







Search report